add complex expression tests; for nested function calls; and different where-clause which create the same group of values
add complex expression tests; for nested function calls; and different where-clause which create the same group of values

andrewgaul/s3-tests,ceph/s3-tests,robbat2/s3-tests,andrewgaul/s3-tests,ceph/s3-tests,robbat2/s3-tests